There are a lot of treatments for CHF but many of them are invasive (surgery) and given that he's 83 it might be too risky. There are drugs and lifestyle changes that can be made, but it is a very serious issue if he's having symptoms.
Thank u so much.. It gives so much relief that drugs can help him.. i will keep informed.. Thanks once again..
I've recently gone through the same experience, and was given some drugs that have helped me become much more comfortable. If his lungs are quite full of fluid it is possible that they will drain them and then administer the drugs. I'm not as old as your grandfather, but not that far behind him in years.
Your grandfather has a good chance of easing his symptoms with good medical care, and could become much more comfortable, and even get back on his feet. Do keep us informed.